/*
 * Copyright (c) 2011-2020, baomidou (jobob@qq.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * <p>
 * https://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.baomidou.mybatisplus.generator.config.querys;

import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * H2Database 表数据查询
 *
 * @author yuxiaobin
 * @since 2019-01-8
 */
public class H2Query extends AbstractDbQuery {

  public static final String PK_QUERY_SQL = "select * from INFORMATION_SCHEMA.INDEXES WHERE TABLE_NAME = '%s'";

  @Override
  public String tablesSql() {
    return "SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE 1=1 ";
  }


  @Override
  public String tableFieldsSql() {
    return "SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME= '%s' ";
  }


  @Override
  public String tableName() {
    return "TABLE_NAME";
  }


  @Override
  public String tableComment() {
    return "REMARKS";
  }


  @Override
  public String fieldName() {
    return "COLUMN_NAME";
  }


  @Override
  public String fieldType() {
    return "TYPE_NAME";
  }


  @Override
  public String fieldComment() {
    return "REMARKS";
  }


  @Override
  public String fieldKey() {
    return "PRIMARY_KEY";
  }


  @Override
  public boolean isKeyIdentity(ResultSet results) throws SQLException {
    try {
      return "auto_increment".equals(results.getString("Extra"));
    } catch (Exception e) {
    }
    return false;
  }
}
